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Physics
Physics
Problem
A spring applies a force
F
=
−
k
x
F=-kx
F
=
−
k
x
on an attached block. Explain briefly why the work done by the spring while the block is stretched from
x
=
0
x=0
x
=
0
to
x
=
+
x
0
x=+x_{0}
x
=
+
x
0
is negative.
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